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math.MG2009★ 4 cited
Polyhedral Surfaces in Wedge Products
Thilo Rörig, Günter M. Ziegler
We introduce the wedge product of two polytopes. The wedge product is described in terms of inequality systems, in terms of vertex coordinates as well as purely combinatorially, fr…
math.MG2009
A Lost Counterexample and a Problem on Illuminated Polytopes
Ronald F. Wotzlaw, Günter M. Ziegler
In a Note added in proof to a 1984 paper, Daniel A. Marcus claimed to have a counterexample to his conjecture that a minimal positively k-spanning vector configuration in R^m has s…